Method and Apparatus for Ranging Transmission by Mobile Station in Wireless Communication System

1. A method for ranging transmission at a mobile station, the method comprising: receiving backoff window information indicating an initial backoff size K 0 from a base station; determining an x th backoff window size K x according to K x =K 0 /(2 x ), wherein the x is a number of ranging retransmissions; and performing the ranging transmission within the backoff window size K x .

2. The method according to claim 1 , wherein the backoff window information is included in a paging message.

3. The ranging transmission method according to claim 1 , wherein the initial backoff size K 0 is greater than 2.

4. A mobile station configured to perform ranging transmission to a base station in a wireless communication system, the mobile station comprising: a receiver; a transmitter; and a processor configured to control the receiver, wherein the processor is configured to control the receiver to receive backoff window information indicating an initial backoff size K 0 from the base station and to determine an x th backoff window size K x according to K x =K 0 /(2 x ), wherein the x is a number of ranging retransmissions; and to perform the ranging transmission within the backoff window size K x .

5. The mobile station according to claim 4 , wherein the backoff window information is included in a paging message.

6. The mobile station according to claim 4 , wherein the initial backoff size K 0 is greater than 2.